Auto jack



Nov. 13 1923.

R E. ANKERMAN AUTO JACK Filed April 9. 1921 Patented Nov. i3, i923.

anar/aa ROY E. ANKERIVIAN, OFWAPAKONETA, OHIO.

AUTO JACK.

Application filed April 9,

To @Z5 'whom t may concern.'

Be it known that ROY E. ANKERMAN. a citizen of the United States of America, residing at W'apakoneta, in the county of Auglaize and State of Ohio, has invented new and useful Improvements in Auto Jacks, of which the following is a specilication.

The object of the invention is to provide a simple and eiicient equal acting jack for use in connection with automobiles and similar vehicles and in like capacities for raising and sustaining objects of considerable weight; and with this object in view the invention consists in a construction and combination of parts of which a preferred embodiment is shown in the accompanying drawings7 wherein:

Figure 1 is a side view of a jack embodying the invention.

Figure 2 is a vertical sectional view of the same.

Figure 3 is a front view.

Figure 4 is a perspective detail View showing' the operating lever;

Figure 5 is a similar view of the plunger bar;

Figure 6 is a similar view of one of the links connecting;` the operating lever with the plunger bar;

Figure 7 is a perspective detail of the retaining pawl and operating lever.

IThe lapparatus embodies a standard 10 of looped forni consisting of a plate or bar' doubled upon itself to form parallel sides 10a which are secured at their lower extremities to a base 11 and are spaced apart to form an intervening slot for the operation of a plunger bar 12 extending slidably through a guide opening 13 in the upper closed end of the standard and provided'at its extremity with a saddle 14C for engagement with an auto axle or the like.

The operating lever 15 is provided with a fulcrum pin 16 adapted for selective engagement: with transversely registering seats 17 consisting of notches in the edges of the side meinbersof the standard, the inner end of the lever which is preferably bifurcated as shown atr18 to substantially span .the space between the side members of the standard beingr connected by links 18Lt with the lower end of the plunger bar. The bifurcation ofthe inner end of the lever serves 1921. serial No. 459,861.

to ensure the lateral guiding movement of the lower end of the plunger bar by holding the links substantially in contact with the inner surfaces of said members.

The lower end of the plunger bar is provided with a transverse guide pin 19 operating terminally in contact with the rear edges of the side members of the standard, the

said plunger bar near its lower extremityl being; deflected rearwardly to properly position said guide pin, while rearward displacement of the lower end of the plunger bar through the operation of the lever is prevented by a guide pin 2O transversely spanning the interval between the side members of the standard in rear of said plunger bar.

ln connection with the above described mechanism there is employed a dog for engaging and holding the plunger bar in its step by step upward movement so as to sustain the load at'the desired elevation and permit of the shifting of the fulcrum pin of the lever from one seat in the standard to the next as the load is progressively elevated.

In the lconstruction illustrated the dog Q1. pivoted upon the standard near its upper end by means of a pin 22 transversely spanning the interval between the members of the standard and extended to form a crank 23 by which the dog may be disengaged from the plunger bar`r the latter having a series of sockets Q4: for successive engagement by a reduced nose portion 25 of the dog which is yieldingly held by gravity in position to engage said sockets as the plunger bar is advanced in raising the load supported thereby.

A terminal extension 26 of the guide pin is arranged in the path of swinging movement of the crank arm to prei/"ent the pawl from being thrown backward far enough to be beyond the actuating effect of gravity tending to hold the dopin its operative 0r engaging' position.

Having described the invention, what is claimed as new and useful is z- A A jack having a standard consisting of laterally spaced side members provided in their front edges with series of transversely registering seats, a plunger bar guided for vertical sliding movement at the upper end of the standard. a lever having a transverse fulcrum pin for selective engagement-with said seats and having a permanent link connection et its inner end with the lower end of the plunger bar, and a dog for locking Vthe plunger bar in Vits step by step upward movement, the plunger bar beingprovided at its lower end with a transverse guiding pin for traversing the rear edges of the side members of the standard and a ifm/ageesV guide pin arranged in spanning relation with said side members to limit the rearward swinging movement of said plunger bar. V10

In testimony whereof he alixes his signature. Y

ROYV E. Auinnmin.V 

